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Apply a function to every row of a matrix or a data frame
...:6, nrow=3, byrow=TRUE)
R> M
[,1] [,2]
[1,] 1 2
[2,] 3 4
[3,] 5 6
R> apply(M, 1, function(x) 2*x[1]+x[2])
[1] 4 10 16
R>
This takes a matrix and applies a (silly) function to each row. You pass extra arguments to the function as fourth, fifth, ... arguments to app...
Easiest way to compare arrays in C#
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274
You could use Enumerable.SequenceEqual. This works for any IEnumerable<T>, not just array...
Initializing a static std::map in C++
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edited Jul 4 '13 at 13:08
answered Sep 26 '08 at 10:17
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Why do C++ libraries and frameworks never use smart pointers?
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124
Apart from the fact that many libraries were written before the advent of standard smart pointer...
Visual Studio: How do I show all classes inherited from a base class?
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48
Sure, Resharper can do this. And much more.
Just right click on type name in any place and cho...
How to find the kth largest element in an unsorted array of length n in O(n)?
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Nir Alfasi
48.4k1111 gold badges6969 silver badges113113 bronze badges
answered Oct 30 '08 at 21:48
eladveladv
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Automating “enter” keypresses for bash script generating ssh keys
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answered Sep 7 '10 at 14:42
RuduRudu
14.6k33 gold badges4141 silver badges6262 bronze badges
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Load a UIView from nib in Swift
... return nil
}
self.addSubview(contentView) // 4
contentView.translatesAutoresizingMaskIntoConstraints = false // 5
contentView.layoutAttachAll(to: self) // 6
return contentView // 7
}
}
Using a discardable return value since the ret...
Rails migration for change column
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Deepak Mahakale
18.4k77 gold badges5454 silver badges7373 bronze badges
answered May 10 '10 at 0:50
Alex KorbanAlex Korb...
How to create new tmux session if none exists
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edited Jan 18 '11 at 12:34
answered Jan 17 '11 at 20:49
Le...